I've just come across this thread and as the 'guy' who vouched for the car I'm a little shocked at the some of the accusations made.
I don't want to get into a tennis match, but having known (and previously worked with) the seller for a number of years, he is a million miles from the person being portrayed.
I can't comment on the speaker issue (first I've heard of it) - maybe an innocent mistake as already mentioned, but on the water ingress, my understanding is as follows:
Prior to the sale there were numerous emails, WhatsApp messages and videos sent to Pondrew in response to his questions.
In one of his messages, Pondrew asked if there was any water in the boot.
Seller went out to check, and admittedly didn't check properly as was 'sure' there wasn't, (as the battery was changed a few months earlier) and only quickly looked in the area around the battery not LH side under the pump
Talking to him recently, he's annoyed with himself that he didn't check fully. He's been advised that the water ingress is typical of a car washed regularly with a hose or pressure washer - this adds up as the car was lovingly looked after and cleaned weekly, hence why I had no hesitation in recommending it.
I'm sorry you weren't happy with the car Pondrew, but I can assure you there was no deliberate intent by the seller to mislead.